Django 3.0: django-notifications giving error: "Notification.recipient" must be a "User" instance

Question

我正在使用 django-notifications-hq 包 link of django-notifications-hq 并收到错误：

Cannot assign "<Seller: john@gmail.com>": "Notification.recipient" must be a "User" instance.

我的自定义 user 型号：

class User(AbstractBaseUser):
    email = models.EmailField(max_length=255, unique=True)
    name = models.CharField(max_length=255, blank=True, null=True)
    staff = models.BooleanField(default=False)
    admin = models.BooleanField(default=False)
    customer = models.BooleanField(default=False)
    seller = models.BooleanField(default=False)
    timestamp = models.DateTimeField(auto_now_add=True)
    is_active = models.BooleanField(default=True)

我的 seller 模型与 user 具有一对一关系：

class Seller(models.Model):
    user = models.OneToOneField(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    seller_picture = models.ImageField(upload_to='profile_pic/seller', null=True, blank=True)

我的 Book 模型有外键 seller:

class Book(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    title = models.CharField('Title', max_length=255)
    authors = models.ManyToManyField(Author, related_name='book_written_by')
    seller = models.ForeignKey(Seller, on_delete=models.CASCADE)
    price = models.DecimalField('Price', decimal_places=2, max_digits=10)
    description = models.TextField('Description')

在我 views 的某处成功获得 books 后，我想通知所有相应的 sellers 有人已经买了他们的书：

for book in books:
     notify.send(Seller, recipient=book.seller, verb="User has just bought book named {} priced 
                                                             as {}".format(book.title, book.price))

我知道它工作正常 recipient = request.user 但我有不同的情况。我怎样才能使 book.seller 成为 User 实例？

Answer 1

这是一个超级简单的解决方案。您已完成 99%！

而不是这个：

for book in books:
     notify.send(Seller, recipient=book.seller, verb="User has just bought book named {} priced 
                                                             as {}".format(book.title, book.price))

试试这个：

for book in books:
     notify.send(book.seller.user, recipient=book.seller.user, verb="User has just bought book named {} priced 
                                                             as {}".format(book.title, book.price))

Seller 有一个名为 user 的属性，但它本身不是 user。

Django 3.0: django-notifications giving error: "Notification.recipient" must be a "User" instance

Django 3.0: django-notifications giving error: "Notification.recipient" must be a "User" instance

django

django-views

pypi

django-notification